we see this extraordinary security environment here in boston and the suburbs. understandable why in water where they believe that he may be holed up. that explains the situation around there. they think they know where he is, but not positive. there is a concern for the last couple of hours that he and his brother may have had accomplices and those accomplices may be at large and could be dangerous. this morning authorities found and disarmed another bomb in the boston area. i say another bomb. i mean a bomb today in the boston area. there is a concern about whether there could be other devices. you put all of those factorsing to and that's the explanation for the unprecedentedly strict security in boston and the suburbs right now. >> when you talk about the motivation and their state of mind and why they did what they did including the attempted robbery of that 7-11, you have got more information on the carjacking that occurred. they took a man at gunpoint for about a half hour. >> right. after the robbery of the 7-11 and after shooting the campus policemen. t